| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] [be] [verb] [prep] [num] | 92 |
|
| 2 | [pron] [vb past] [be] [v-ing] [prep] [num] | 56 |
|
| 3 | which [verb] [be] [v-ing] [prep] [num] | 17 |
|
| 4 | which [vb past] [be] [v-ing] [prep] [adj] | 17 |
|
